Valve for internal-combustion engines.



J. L. CLOUDSLEY,

VALVE FOR INTERNAL COMBUSTION ENGINES.

APPLICATION FILED APR-811915,.

Patented Apr. 11, 1916.

v/g' Z 1 i a F I z]; x i -f" 0/ 20 3: 12 .v' f 51 I J I. f A i' @J J5 JL i lnvnwr Q No.6 UWJJAQQ g @QSRDNEALQaYNJY JOHN LESLIE GLOUDSLEY, OFLONDON, ENGLAND.

, VALVE For. mrnnnan-comnosrron ENGINES.

Specification of Letters Patent.

Patented Apr. 11, 1916.

i Application filed April 8, 1915. Serial No. 19,939. i

To all whom it may concern:

Be it known that I, Jonxf LESLIE CLoUns- LEY, a subject of the King'ofEngland, residing in London, England, have invented certain new anduseful, Improvements in Valves for Internal-Combustion Engines, ofwhichthe followingis a specification.

This invention is for improvements in or relating to valves for internalcombustionengines and has for its object to provide an improvedconstruction of valve whereby both the gas andlhe air are controlled byseparate throttles so as to insure the mixture being correct at allspeeds and loads.

It will be understood that where gas is referred to in thisspecification, it may mean either true gas as used in a gas engine,atomized liquid fuel, or richly carbureted air.

The invention is applied to-engines having separate chambers or pumpsfrom which air and gas are separately supplied to the working cylinder.

Thepresent invention therefore consists in the combination, in aninternal combustion engine having separate gas and air inlets and athrottle valve on each inlet, with the valves of means whereby thevariation in pressure produced in the conduit on the delivery side ofone valve by hand or governor operation thereof, controls the movementofthe other valve, for example in such a manner that the pressure on thedeliveryside of the second valve becomes equal to that on the deliveryside of the first valve.

In the preferred construction the air-valve is automatically cont-rolledby the variations in pressure in the passage .on the engine side of thegas-throttle. The means for effecting this may comprise a piston ordiaphragm subjected differentially to the pressures in the passages onthe engine slde, of the two valves respectively the piston or diaphragmmay be arranged in a cylinder whereof one side is open to the passage onthe engine side of the air-valve and the other end of the cylinder isconnected by an open pipe to the engine side of the gas-throttle,

According to another feature of the 1nvention an auxiliary air-valve maybe provided to admit air into the gas-pipe on the engine side of thegas-throttle, this valve be ing operatively connected to thegas-throttle in such a manner that it is open when the gas-thr ttle isclosed'am'l vice versa. It will be appreciated that the opening orclosing of this valve atfects the pressure in the construction gas pipeand this variation in pressure also has an effect on-th e mainair-valve.,This arrangement 1s designed to provide in the manner hereinafterdescribed for the-varia tion 1n the strength of the mixture of thecombustible charge which is required under ordinary conditions; these.conditions are that when the engine is throttled down on light load,only a weak mixture is necessary, but when the gas-throttle is fullyopen and the engine is under load a stronger mixture 1s required.

Other features of the invention are hereinafter described and the noveldetails set forth inthe claims. a

The accompanying drawing shows in sectionalelevation a gas-valve and anairvalve for a two-cylinder engine, adapted to cooperate with oneanother in-the manner above described. It will beu'nderstood that therelative positions of these two valves will not necessarily "be the sameas indicated for they will be situated at any convenient place on theengine. The construction illusengine governor to maintain the engine ata uniform speed.

The gas-throttle A is situated in the gasinlet-pipe A which communicateswith two pipes'A A leading to each of the cylinders of a two-cylinderengine. The throttle A itself may take any convenient form; in theillustrated it comprises a slotted cylinder which is movable axiallyacross the supply pipe A to present avariable aperture thereto andthereby control the quantity of gasfiowin'g through .it to the engine;or to the ump supplying the engine. From the pipe A on the engine-sideof the throttle A, connection is made by a tube-.B to

a chamber C so that variations in'the prespressure in the chamber C.(that is to. .'a vtn the pressure in thetubeerhj) and on the thepressure of.

other side to the pressure .in the valve-chamber D and passages 'D, D(that is .to say, the main air supply on the engine. side of the valvecontrolling that supply) The valve D may be of any desired form and isillustrated as a sleeve secured on the rod C by a grub'screwC thissleeve moves across the-inlet aperture I) uncovering more 'or less ofitas the piston C moves. I

, .While..the gas-throttle A may be controlled by hand, in theconstruction illustrated. it is controlled by an engine governor.

A lever E pivotedat E on a bracket secured to "the engine frame isoperatively connected,

atone end, (not shown) to the governor gear.

1 and at the other end, by an adjustable tie rod E to the throttle, thearrangement be ing into the pipe A.

"deal-with only comparatively small throttle A butso as to be moved inthe opposite direction; that is to say when the gasrod F to the leverthrottle is moved toward its closing position. the l auxiliary air-valveG- 30- nected by a tierod F to a lever F I is moved toward its, openposition. The throttle G is conpivoted at F and this lever is connectedonthe opposite side of the pivot F iby an adj ustable'tie- It will beseen that when-the lever E moves. the valve A, it simultaneouslyrocksthe lever F and thereby moiresthe valve. Gr in-the oppositedirection to. the movement of the valve A.

Thei control-hlitheengine is efi'ected by the valves hereinbeitoredescribed in the following manner: If the. engine is running on load,

and. the load'is-removed'the speed rises and vthe governorgthereuponmoves the gasdiminished pressure in throttle A toward its closingposition. The hrottljng or the gas supply produces a the part A*' of theinletapipe' and this reduced pressure is communica'ted through the pipeB to the chamher. (1' of the air-controlling valve D. The

pressure on the'lower side of the piston C being reduced causes thepiston tofall and move the main air-valve D downward across theair-inlet I) thus throttling the air supply... This movement continuesuntil the throttling of the air supply is such that the lpres'surain thechamber 1) andpipes D D is the same as the The arrangement andadjustment of the parts are such that the throttling of the airsupply-isproportional to the throttling of that with-these parts only inoperation a mixture of constant strength would be obtained. Theauxillary' air-valve Gr however, which admits air to the gas pipe A is,as above mentioned, operated simulpressure 1n the chamber G.

, riva ries taneously with the gas-valve A. When,

'therefore, the gas-valve A is moved toward-- its-closing position theauxiliary air-valve G is opened and some air is admitted to the plpe A.This admission of air prevents the full reduction, of pressure,

'70 which would have been obtained by the throttling action of the valveA from being obtained and consequently the piston O and valve 1) are notmoved to the full extent which they would have been consequent on thechange in pressure of the gas alone. A proportionately greater quantityof air is thereby allowed to enter at the air-inlet D and this, togetherwith the small quantity of air which enters past the valve G, gives aweaker mixture which is what is required when the engine is runninglight.

It will be seen that this invention makes use of the slight increase inthe engine speed by'the action of the governor, to effect the change inthe strength of the mixture which is desirable with load variations. Theoperation of these valves hasv been described for changes due to takingthe load ofi the engine and it will be appreciated that the converseaction of putting load on the engine causesa reduction in speed, and theoperation of the valves is then such as to give a greaterquantity of astronger mixture. l

This invention, it will be seen, provides a means for automaticallycontrolling both the quantity of fuel supplied to the engine, and therichness of the mixture according to the conditions of load and speedunder which the engine is running.

Variousmodifications may be made in the details of the invention'withoutdeparting from the spirit thereof; thus for. example, the arrangementabove described may be reversed in 'so far as the primary control may beeffected on the air-valve and the automaticcontrol on the gas-throttle.I The valves hereinbefore described are particularly suitable for usewith a governor-controlled engine "but it 'will be appr eeiated' thatthey may also be usedwith a hand-controlled engine.

. What I claimas my invention and desire to'secure by Letters Patentis 1. In an internal combustion engine the combination of a gas-inlet, athrottle controlling said inlet, a separate air-inlet, an

air-valve controlling said inlet, a rod carrying mid air-valve andextending into a cy1- inder, a piston mounted on said rod and op- 18'ing one'end of sa erative in said cylinder, a conduit connect V cylinderto theair-inlet conduit on the de Very side of the air-valve and anotherconduit connecting the other end of said. cylinder to inlet on thedelivery side of the gas-throttle substantially. as set forth.

3. In an internal combustion engine the combinatio'n of a gas-inlet, athrottle controllingsaid inlet, a separate air-inlet, an air-valvecontrolling said inlet, means controlled by the "ariations in pressurein the conduit on the delivery side of one of said valves, operativetocontrol movements of the other of saidvalves, an auxiliary airinletcommunicating with the gas-inlet on the deliveryside of the gas-throttleand a valve controlling said auxiliaryair-inlet and operativelyconnected to the throttle. substantially as set forth.

the separate gas-' 4 In an internal combustion engine the combination ofa gas-inlet, a' throttle controlling said inlet, a separate air-inlet,an rairrvfalve controlling said inlet and means subjecteddifl'erentially to the pressures in the conduits on the delivery side ofthe valves controlling said inlets, said means controlling one of saidvalves, an auxiliary air-inlet communicating with the gas-inlet on thedelivery side of the gas-throttle and a valve controlling said auxiliaryair-inlet and operatively connected to the throttle, v

substantially asset fort In testimony whereof I have signed my name tothis specification in the presence of two subscribing witnesses.

J OHN LESLIE. CLOUDSLEY.

Vitnesses:

JOHN CAMERON RENNIE, H. D. JAMESON.

